CN105219358B - A kind of drilling fluid inorganic organic polymer inorganic agent and preparation method thereof - Google Patents
A kind of drilling fluid inorganic organic polymer inorganic agent and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of inorganic organic polymer inorganic agent of drilling fluid, wherein, the inorganic agent is formed to be polymerize by sulfonic acid monomer, carboxylic acid monomer, non-ionic monomer and inorganic material in the presence of initiator；And lithium magnesium silicate inorganic gel is included in the inorganic material.Inorganic organic polymer inorganic agent provided by the invention is respectively provided with stronger filtrate reducing effect in fresh-water drilling fluid, salt-water drilling fluid, saturated salt-water drilling fluid and compound salt-water drilling fluid.It also has stronger caving-preventing ability, can effectively control shale hydration to disperse, control clay pulping, permeability resume figure is high, has preferable reservoir protection effect.And its simple production process, raw material sources are wide, promotion prospect is wide.The present invention correspondingly provides a kind of preparation method of drilling fluid with inorganic organic polymer inorganic agent.
Description
Technical field
The present invention relates to a kind of drilling fluid inorganic-organic monomer polymer inorganic agent and preparation method thereof, belong to water-soluble
Property synthesis of polymer material preparing technical field.
Background technology
Since the 1980s, the quantity increase of deep-well, ultradeep well, Holes of Complicated Wells is bored in countries in the world, and this is just to drilling fluid
Technology proposes higher requirement, and drilling liquid technology will not only meet the requirement of traditional function, but also meet environment, oil reservoir
Protection and raising bit speed, reduce the requirement of drilling well integrated cost etc., and just towards economic, safe and efficient target
Development.Original additive for drilling fluid can not fully meet the needs of Development of Drilling Fluids, and countries in the world all are making great efforts to grind
System exploitation New drilling fluid inorganic agent, to adapt to the needs of Development of Drilling Fluids.
Limited by novel process agent, China is in drilling liquid technology field slower development.Drilling well speed is especially improved in the recent period
The cry more and more higher of degree and reservoir protec-tion, wants bit speed is significantly increased, to greatest extent reservoir protec-tion, most
Oil gas well yield is ensured eventually, must just be developed and is adapted to drilling well new technology and be adapted to Drilling and completion fluids development need
New drilling fluid inorganic agent.Therefore, MOLECULE DESIGN and the study on the synthesis work of New drilling fluid inorganic agent are carried out in good time, to exploitation
The progress of new product and promotion drilling fluid engineering technology is significant.
But in recent decades, the research and development of additive for drilling fluid are carried out mainly along the fixed mode of organic polymer,
Its heat and salt resistance turns into the difficult point of inorganic agent development.And if in terms of Research idea is placed on into inorganic compound, due to inorganization
The characteristic of compound causes inorganic agent no longer to face the subject matter of temperature-resistant anti-salt.At organic polymer of the research and development containing inorganic matter
Manage agent technical field, the previously proposed patent application CN200710180495.0 of inventor, it is disclosed that a kind of inorganic-organic
The preparation method of monomer polymer drilling fluid finishing agent, specifically, with acryloyl-oxy butyl sulfonic acid, acrylamide, acrylic acid and
Silicon magnesium gel is raw material, adjusts pH value as 9~11 using sodium hydroxide and sodium carbonate, adds initiator and carry out polymerisation, instead
The macromolecule polyalcohol that should terminate to obtain obtains the inorganic agent after drying and crushing.The inorganic agent obtains in applying at the scene
Positive effect, but this area also needs to research and develop a kind of improved and effect more excellent drilling fluid and polymerize with inorganic-organic
Thing inorganic agent and preparation method thereof.
The content of the invention
Therefore, present invention firstly provides a kind of drilling fluid inorganic-organic polymer inorganic agent, wherein, the inorganic agent
Formed to be polymerize by sulfonic acid monomer, carboxylic acid monomer, non-ionic monomer and inorganic material in the presence of initiator；It is and described inorganic
Lithium magnesium silicate inorganic gel is included in material.
In a kind of specific embodiment, the sulfonic acid monomer is selected from 2- acrylamide-2-methyl propane sulfonics, 2- propylene
Acyloxy -2- methyl propane sulfonic acids, acryloyl-oxy fourth sulfonic acid, 2- acrylamide -2- Phenyl-ethanesulfonic acids and 2- acrylamide dodecanes
Base sulfonic acid, the carboxylic acid monomer are selected from acrylic acid, methacrylic acid, itaconic acid and maleic acid, and the non-ionic monomer is selected from third
Acrylamide, N, N- DMAAs, isobutyl group acrylamide and acrylonitrile.
The present invention is not particularly limited to the species and dosage of the initiator, as long as monomer mixture can be triggered to gather
Conjunction, for example, the initiator can be one in azo-initiator, peroxide initiator and redox type initiators
Kind is a variety of.It is preferred that the initiator is the oxidation-reduction trigger system for including Oxidizing and Reducing Agents, wherein oxidant is selected from
Potassium peroxydisulfate, ammonium persulfate and sodium peroxydisulfate, reducing agent are selected from sodium hydrogensulfite, sodium sulfite, sodium thiosulfate, pyrosulfurous acid
Sodium, ferrous sulfate and frerrous chloride.
In the present invention, in the inorganic material it is also an option that ground comprising silicon magnesium gel, aluminium magensium silicate inorganic gel,
The one or more of aluminium triphosphate, bentonite, sepiolite and attapulgite etc..It is described in a specific embodiment
Lithium magnesium silicate inorganic gel in inorganic material accounts for more than the 50wt%, preferably more than 80wt% of the gross mass of inorganic material.
The present invention also provides a kind of preparation method of inorganic agent as described above, comprises the following steps：1) containing the water-soluble of alkali
Inorganic material is added in liquid, is ground after stirring with colloid mill, is no more than in temperature under conditions of 35 DEG C to mixed after grinding
Close and sulfonic acid monomer and carboxylic acid monomer are added in liquid, non-ionic monomer is added thereto again after continuing stirring 1 minute~3 hours, then
Reaction mixture is obtained after continuing stirring 1 minute~5 hours；2) reaction mixture obtained by step 1) is inserted into polymerization reaction
In container, selectively continue stirring 1~30 minute, solution ph is adjusted to 8~11 with alkali, adds initiator, and is controlled poly-
The initial temperature for closing reaction is 35~50 DEG C, reacts 2~24 hours, obtains gum-like product；It is by products therefrom drying and crushing
Obtain the inorganic agent.
The present invention compared with prior art, not only optimizes the inorganic material of addition, and improves and prepare drilling fluid use
The polymerization of inorganic-organic polymer inorganic agent.First, in method of the invention, inorganic material is to add at first, and to it
Being added after being ground using colloid mill includes the organic monomer of the sulfonic acid monomer, carboxylic acid monomer and non-ionic monomer, so as to
Inorganic material is set preferably to participate in reacting and as much as possible increasing the introduction volume of inorganic material in inorganic agent in the course of the polymerization process.This
The introduction volume of inorganic material is 5~25wt% in invention, hence it is evident that more than corresponding prior art (3.6~8.3wt%)；Thus originally
Invention significantly reduces the cost of polymer on the basis of resulting polymers performance is ensured.Secondly, in method of the invention,
The temperature control of system is under conditions of no more than 35 DEG C when adding sulfonic acid monomer and carboxylic acid monomer, in order to avoid organic acid monomer and alkali
Generation neutralization reaction and heat release, and then cause the autohemagglutination of organic monomer, and the drilling fluid for finally influenceing gained is gathered with inorganic-organic
The performance of compound inorganic agent.Therefore, the polymer treatment agent that heretofore described method obtains and inorganic agent of the prior art
Compare, have the advantage of high-performance and low cost concurrently.
In an instantiation of above-mentioned preparation method, inorganic material accounts for described in used raw material before polymerisation
Sulfonic acid monomer, carboxylic acid monomer, the mass percent of gross mass of non-ionic monomer and inorganic material are 5~25%, preferably 10
~25%.As described above, when inorganic material uses more, can be greatly reduced on the basis of resulting polymers performance is lifted poly-
The cost of compound.
In above-mentioned preparation method, it is preferred that the material in step 1) between sulfonic acid monomer, carboxylic acid monomer and non-ionic monomer
The ratio between amount be 10~40：10~25：80~35.Additionally, it is preferred that the dosage of the reaction mixture reclaimed water of step 1) is with control
The gross mass of reaction raw materials is the 40~60% of reaction mixture quality.
In an instantiation of above-mentioned preparation method, the dosage of the initiator is sulfonic acid monomer, carboxylic acid monomer and
0.2~0.75wt% of non-ionic monomer gross mass, and the mass ratio of the oxidant and the reducing agent is 1:1~2.5.
In another example, the amount of the material of alkali used and the amount sum of the carboxylic acid monomer and the material of sulfonic acid monomer in step 1)
Ratio is 1:0.9~1.1, preferably 1：1.
Inorganic-organic polymer inorganic agent provided by the invention is in fresh-water drilling fluid, salt-water drilling fluid, saturated brine drilling well
Stronger filtrate reducing effect is respectively provided with liquid and compound salt-water drilling fluid.It also has stronger caving-preventing ability, can effectively control
Shale hydration is scattered, control clay pulping, and permeability resume figure is high, has preferable reservoir protection effect.And it is produced
Technique is simple, raw material sources are wide, and promotion prospect is wide.Generally speaking, high temperature and/or high salt can be met by inventing the additive of offer
Under the conditions of safety drilling construction needs, rheological characteristic, suspension stability under water-base drilling fluid high-temperature and high-pressure conditions can be controlled
And filter loss.
Embodiment
With reference to embodiment, the present invention is described in detail.It should be appreciated that tool described herein
Body embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The product of lithium magnesium silicate inorganic gel used in the present invention for Hangzhou Zhejiang nonmetallic Co., Ltd, it is used
Attapulgite originate from the Da Tong mineral products processings factory of Lingshou County hundred.
Embodiment 1~3 is to prepare the inorganic-organic polymer inorganic agent of present invention gained.
Embodiment 1
1) 14 kilograms of sodium hydroxides and 160 kg of water are added and neutralizes kettle, add 20 kilograms of lithium magnesium silicon until completely dissolved
Hydrochlorate inorganic gel, is ground after stirring with colloid mill.Mixed liquor after grinding is added into reactor, is no more than 35 in temperature
30 kilograms of 2- acrylamide-2-methyl propane sulfonics and 15 kilograms of acrylic acid are slowly added under conditions of DEG C, continue to stir after adding
10 minutes.55 kilograms of acrylamides are added, continues to stir 25 minutes after adding, obtains reaction mixture.
2) reaction mixture for obtaining step 1) adds polymeric kettle, stirs 5 minutes, with the hydroxide of mass fraction 10%
The pH value of system is adjusted to 9.0 by sodium solution.Add 0.3 kilogram of ammonium persulfate and 0.5 kilogram of sodium hydrogensulfite (is matched somebody with somebody with appropriate water
The aqueous solution of system), static after stir about 15min, the initial temperature for controlling polymerisation is 35 DEG C, reacts 6 hours, obtains glue
Product；Products therefrom is dried at 120~130 DEG C, it is the sample of embodiment 1 to crush.
Embodiment 2
1) 14 kilograms of sodium hydroxides and 170 kg of water are added and neutralizes kettle, add 20 kilograms of lithium magnesium silicon until completely dissolved
Hydrochlorate inorganic gel, is ground after stirring with colloid mill.Mixed liquor after grinding is added into reactor, is no more than 35 in temperature
20 kilograms of acryloyl-oxy fourth sulfonic acid and 18 kilograms of itaconic acids are slowly added under conditions of DEG C, continue stirring 15 minutes after adding.Add
Enter 28 kilograms of acrylonitrile, continue to stir 30 minutes after adding, obtain reaction mixture.
2) reaction mixture for obtaining step 1) adds polymeric kettle, stirs 10 minutes, with the hydrogen-oxygen of mass fraction 40%
Change sodium solution and the pH value of system is adjusted to 11.0.Add 0.35 kilogram of potassium peroxydisulfate and 0.7 kilogram of sodium pyrosulfite (is used in right amount
The aqueous solution that water is prepared), static after stir about 10min, the initial temperature for controlling polymerisation is 45 DEG C, reacts 7 hours, obtains
Gum-like product；Products therefrom is dried at 120~130 DEG C, it is the sample of embodiment 2 to crush.
Embodiment 3
1) 20 kilograms of saleratus and 120 kg water are added and neutralizes kettle, add 12.5 kilograms of lithium magnesium until completely dissolved
Silicate inorganic gel and 3.0 kilograms of attapulgites, are ground after stirring with colloid mill.Mixed liquor after grinding is added anti-
Kettle is answered, 65 kilogram of third 2- acryloyl-oxy -2- methyl propane sulfonic acid and 25 kilograms are slowly added under conditions of temperature is no more than 35 DEG C
Itaconic acid, continue stirring 20 minutes after adding.40 kilograms of acrylonitrile are added, continue to stir 30 minutes after adding, obtain reaction mixing
Liquid.
2) reaction mixture for obtaining step 1) adds polymeric kettle, stirs 9 minutes, with the hydroxide of mass fraction 40%
The pH value of system is adjusted to 10.0 by sodium solution.0.8 kilogram of Ammonium Persulfate 98.5 and 0.7 kilogram of sodium pyrosulfite are added (with appropriate water
The aqueous solution of preparation), static after stir about 5min, the initial temperature for controlling polymerisation is 50 DEG C, reacts 10 hours, obtains glue
Shape product；Products therefrom is dried at 130~140 DEG C, it is the sample of embodiment 3 to crush.
Comparative example 1
This example is used for the organic polymer inorganic agent of contrast to prepare.
1) 14 kilograms of sodium hydroxides and 160 kg of water are added and neutralizes kettle, be no more than 35 DEG C in temperature until completely dissolved
Under conditions of be slowly added into 30 kilograms of 2- acrylamide-2-methyl propane sulfonics and 15 kilograms of acrylic acid, continue stirring 10 after adding
Minute.55 kilograms of acrylamides are added, continues to stir 25 minutes after adding, obtains reaction mixture.
2) reaction mixture for obtaining step 1) adds polymeric kettle, stirs 5 minutes, with the hydroxide of mass fraction 10%
The pH value of system is adjusted to 9.0 by sodium solution.Add 0.3 kilogram of ammonium persulfate and 0.5 kilogram of sodium hydrogensulfite (is matched somebody with somebody with appropriate water
The aqueous solution of system), static after stir about 15min, the initial temperature for controlling polymerisation is 35 DEG C, reacts 6 hours, obtains glue
Product；Products therefrom is dried at 120~130 DEG C, is the sample of comparative example 1 after crushing.
Comparative example 2
This example is used for the polymer treatment agent of contrast to prepare.
Preparation-obtained gum-like product in the step 2) of comparative example 1 and 20 kilograms of lithium magnesium silicate inorganic gels is direct
After being mixed evenly, dried at 120~130 DEG C, be the sample of comparative example 2 after crushing.
The present invention provides the inorganic-organic monomer polymer as additive for drilling fluid in the following specific embodiments
Application.In order to illustrate the effect of the present invention, it (is used code name SM- by the sample synthesized below using embodiment 1 for ease of narration
1 represents) it is the performance introduction that representative carries out application aspect, therefore, place used if not particularly pointing out in the embodiment of the present invention
It is SM-1 to manage agent.
In performance evaluation of the present invention, calcium bentonite, meet SY/T5060-1993 standards regulation；Sodium bentonite, meet SY/
T5060-1993 standards provide；Antisaline soil, meet SY/T5603-1993 standards regulation；Anhydrous calcium chloride, chemistry are pure；Sodium chloride,
Analyze pure；Magnesium chloride, analysis are pure；Natrium carbonicum calcinatum, analysis are pure.Homogenizer, GJ-1 types；Middle pressure filter press, ZNS types；Six
Fast rotation viscometer, ZNN-D6 types；High temperature rolls 50~300 DEG C of baking oven.
Wherein, base slurry is formulated as follows：
1) fresh water-based slurry：3g soda ash and 40g calcium or sodium bentonite are added in 1000mL running water, stirs 8h, room temperature is put
48h is put, obtains fresh water-based slurry.
2) brine mud：40gNaCl, high-speed stirred 5min are added in 1000mL4% sodium bentonite base slurry, room temperature is put
24h is put, obtains brine mud.
3) the water base slurry of saturated salt：35% sodium chloride, high-speed stirred are added in 1000mL4% bentonite fresh water-based slurry
5min, room temperature place 24h, obtain the water base slurry of saturated salt.
4) compound salt-water basic slurry：15.75g sodium chloride, 2.62g anhydrous calcium chlorides, 6.9g chlorine are added in 350mL distilled water
Change magnesium, 52.5g calcium bentonites and 3.15g natrium carbonicum calcinatums, high-speed stirred 20min, room temperature places aging 24h, obtains compound salt solution
Base is starched.
Embodiment 4 and comparative example 4
Embodiment 4 and comparative example 4 list influence of the SM-1 polymer of different dosages to different type property of drilling fluid,
Wherein embodiment 4a and comparative example 4a is influence of the SM-1 polymer to fresh-water drilling fluid performance of different dosages, embodiment 4b and
Comparative example 4b is that influence of the different dosage SM-1 polymer to salt-water drilling fluid performance, embodiment 4c and comparative example 4c add to be different
Influence of the SM-1 polymer to saturated salt-water drilling fluid performance is measured, embodiment 4d and comparative example 4d are different dosage SM-1 polymer
Influence to compound salt-water drilling fluid performance.
Table 1 is influence of the different dosage SM-1 polymer to fresh-water drilling fluid performance.
Table 1
| Dosage (wt%) | FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Comparative example 4a-1 | 0 | 17 | 15 | 4 | 11 |
| Embodiment 4a-1 | 0.1 | 7.0 | 22 | 14 | 8 |
| Embodiment 4a-2 | 0.3 | 6.0 | 40 | 19 | 21 |
| Embodiment 4a-3 | 0.5 | 5.4 | 68 | 33 | 35 |
As it can be seen from table 1 SM-1 in fresh-water drilling fluid there is stronger filtrate reducing to act on, when dosage is 0.1%
The filter loss (FL) of drilling fluid can be made substantially reduce (being less than 10mL).For the viscosity of drilling fluid and shear force, with its use
Amount increase, the viscosity (AV and PV) of drilling fluid and shear force (YP) etc. significantly increases, and shows stronger proposing and glues and cuts energy
Power, and from the experimental results, SM-1 addition improves the shear thinning behavior of drilling fluid.
Table 2 is influence of the different dosage SM-1 polymer to salt-water drilling fluid performance.
Table 2
| Dosage (wt%) | FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Comparative example 4b-1 | 0 | 84 | 4.5 | 2 | 2.5 |
| Embodiment 4b-1 | 0.3 | 8.0 | 8.5 | 7 | 1.5 |
| Embodiment 4b-2 | 0.5 | 5.0 | 14 | 12 | 2 |
| Embodiment 4b-3 | 0.7 | 3.6 | 22 | 18 | 4 |
| Embodiment 4b-4 | 1.0 | 2.6 | 30 | 21 | 9 |
From table 2 it can be seen that SM-1 in salt-water drilling fluid there is stronger filtrate reducing to act on, when dosage is 0.3%
The filter loss of drilling fluid can be made substantially reduce, and show and stronger put forward viscous ability.
Table 3 is influence of the different dosage SM-1 polymer to saturated salt-water drilling fluid performance.
Table 3
| Dosage (wt%) | FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Comparative example 4c-1 | 0 | 134 | 6 | 4 | 2 |
| Embodiment 4c-1 | 0.5 | 5.2 | 14 | 10 | 4 |
| Embodiment 4c-2 | 0.7 | 5.0 | 16 | 9 | 5 |
| Embodiment 4c-3 | 1.0 | 4.2 | 18 | 13 | 5 |
| Embodiment 4c-4 | 1.5 | 3.6 | 22.5 | 15.5 | 7 |
From table 3 it can be seen that SM-1 in saturated salt-water drilling fluid there is stronger filtrate reducing to act on, when dosage reaches
When 0.5%, there is obvious reduction trend in filter loss, and is gradually reduced with the increase of polymer dosage, and drilling fluid
Viscosity also gradually rises.
Table 4 is influence experimental result of the different dosage SM-1 polymer to compound salt-water drilling fluid performance.
Table 4
| Dosage (wt%) | FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Comparative example 4d-1 | 0 | 84 | 8 | 4 | 4 |
| Embodiment 4d-1 | 0.5 | 8.0 | 9 | 6 | 3 |
| Embodiment 4d-2 | 0.7 | 6.0 | 10 | 6 | 4 |
| Embodiment 4d-3 | 1.0 | 4.0 | 16 | 11 | 5 |
| Embodiment 4d-4 | 1.5 | 2.6 | 26 | 19 | 7 |
From table 4, it can be seen that SM-1 in compound salt-water drilling fluid there is stronger filtrate reducing to act on, when dosage 0.5%
When the filter loss of drilling fluid is down to below 10mL, and show and stronger put forward viscous ability.
Embodiment 5
Embodiment 5 lists the temperature resistance experimental result of the polymeric additive SM-1 of gained in embodiment 1.Wherein embodiment
5a is influences of the SM-1 to fresh-water drilling fluid performance, and embodiment 5b is influences of the SM-1 to salt-water drilling fluid performance, embodiment 5c
For influences of the SM-1 to saturated salt-water drilling fluid performance, embodiment 5d is influences of the SM-1 to compound salt-water drilling fluid performance.
Table 5 is the temperature resistance experimental result that different drilling fluids are handled with SM-1, old accordingly when wherein aging temperature is 180 DEG C
The change time is 16h；And the polymeric additive dosage in embodiment 5a~5d be respectively 0.5wt%, 1.0wt%, 1.5wt% and
1.5wt%, the dosage of each its corresponding 180 DEG C of room temperature polymeric additive used when testing are identical.
Table 5
| Aging temperature (DEG C) | FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Embodiment 5a-1 | Room temperature | 5.4 | 68 | 33 | 35 |
| Embodiment 5a-2 | 180 | 4.8 | 25 | 19 | 6 |
| Embodiment 5b-1 | Room temperature | 2.6 | 30 | 21 | 9 |
| Embodiment 5b-2 | 180 | 4.0 | 9 | 6 | 3 |
| Embodiment 5c-1 | Room temperature | 3.6 | 22.5 | 15.5 | 7 |
| Embodiment 5c-2 | 180 | 10 | 7 | 4 | 3 |
| Embodiment 5d-1 | Room temperature | 2.6 | 26 | 19 | 7 |
| Embodiment 5d-2 | 180 | 14 | 4.5 | 2.5 | 2 |
As can be seen from Table 5, the filter loss of various drilling fluids changes smaller before and after 180 DEG C of agings after being handled with SM-1,
Illustrate that SM-1 has stronger temperature resistance ability.
Embodiment 6 and comparative example 6
Embodiment 6 lists the polymeric additive SM-1 of gained in embodiment 1 and polymerize with what oil drilling scene was commonly used
The contrast and experiment of thing inorganic agent SD-17W, MAN-101, SL-1 in saturated salt-water drilling fluid.Wherein, comparative example 6a is not
The testing result of the saturated salt-water drilling fluid of any additive is added, comparative example 6b is to add 2wt% in saturated salt-water drilling fluid
Additive SD-17W testing result, comparative example 6c is the additive MAN-101 that 2wt% is added in saturated salt-water drilling fluid
Testing result, comparative example 6d are the testing result for the additive SL-1 that 2wt% is added in saturated salt-water drilling fluid, and embodiment 6a is
The testing result of the additive SM-1 in the 2wt% present invention is added in saturated salt-water drilling fluid.In addition, those skilled in the art
It is appreciated that SD-17W, MAN-101 and SL-1 belong to organic monomer polymer additive, wherein and not containing inorganic matter.
Table 6 lists contrast and experiment of the different polymeric additives in saturated salt-water drilling fluid, wherein the number
According to being obtained at 180 DEG C after aging 16h.
Table 6
| FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Comparative example 6a | 228 | 5 | 4 | 1 |
| Comparative example 6b | 86 | 11 | 10 | 1 |
| Comparative example 6c | 50 | 17 | 14 | 3 |
| Comparative example 6d | 45 | 15 | 12 | 3 |
| Embodiment 6a | 8 | 9 | 5 | 4 |
As can be seen from Table 6, SM-1 has stronger temperature-resistant anti-salt ability, and when dosage is 2%, its filtrate reducing effect is excellent
In polymer treatment agent SD-17W, MAN-101 and SL-1 that oil drilling scene is conventional.
Embodiment 7 and comparative example 7
Embodiment 7 is listed in well slurries of the polymeric additive SM-1 of gained in embodiment 1 after saturated brine pollution
Detection results.Wherein comparative example 7a is the testing result of the deep 28 well well depth 2670m wells slurries of Zhongyuan Oil Field Pu, comparative example 7b be
1 is pressed in above-mentioned well slurry：1 ratio is mixed into the testing result of the slurry of the well through saline pollution obtained after saturated brine, embodiment 7a
For the testing result after the additive SM-1 of the present invention is added in the above-mentioned well slurry through saline pollution, in wherein embodiment 7a-1
SM-1 addition is 0.3wt%, and SM-1 addition is 0.5wt% in embodiment 7a-2, and experimental results are shown in Table
7。
Table 7
| FL/mL | AV/mPa.s | PV/mPa.s | YP/Pa | |
| Comparative example 7a | 3 | 52.5 | 30 | 22.5 |
| Comparative example 7b | 12.2 | 31 | 2 | 29 |
| Embodiment 7a-1 | 5.2 | 55 | 15 | 40 |
| Embodiment 7a-2 | 2.8 | 76 | 27 | 49 |
As can be seen from Table 7, the filter loss of drilling fluid substantially reduces after addition SM-1, and filtrate reducing effect increases with its dosage
Add and strengthen, show that SM-1 and live drilling fluid have preferable compatibility, can be good at controlling well to starch filter loss after pollution
Raise phenomenon.
Embodiment 8 and comparative example 8
Embodiment 8 and comparative example 8 list 1% aqueous solution apparent viscosity of different polymer and its in compound DWSWs
Performance test results in liquid.Wherein comparative example 8a is the organic polymer inorganic agent that the comparative example 1 used obtains, comparative example 8b
It is the inorganic agent that the comparative example 2 used obtains, comparative example 8c is the place obtained by the prior art CN200710180495.0 used
Agent is managed, embodiment 8a is the inorganic agent SM-1 of the gained of embodiment 1 used, and embodiment 8b is adding obtained by the embodiment 3 used
Add agent.
Table 8 is 1% aqueous solution apparent viscosity of different polymer and the experimental result of compound salt-water drilling fluid performance.
Table 8
As can be seen from Table 8, first, the 1% of the polymer of the polymer of the gained of embodiment 1 and the gained of embodiment 3 is water-soluble
Liquid apparent viscosity is quite and apparently higher than the inorganic agent in comparative example 1, comparative example 2 and prior art CN200710180495.0
The apparent viscosity of 1% aqueous solution.
Secondly, from embodiment 8 (including embodiment 8a and 8b) and comparative example 8a relatively, inorganic agent of the invention exists
Filtrate reducing effect in drilling fluid is more excellent, carries that viscous to cut ability more preferable.Inorganic-organic polymer processing prepared by this explanation present invention
Agent can also reach even preferably effect suitable with pure organic polymer inorganic agent cost-effective while.
And again will from embodiment 8 and comparative example 8b comparative descriptions, comparative example 2 after organic polymer inorganic agent is obtained
The mixed scheme of inorganic material can not form the inorganic-organic polymer inorganic agent similar to the present invention, and comparative example 2 is corresponding
Inorganic agent either filtrate reducing effect still carry it is viscous cut ability in terms of all embody poor performance.
In addition, from comparative example 8c compared with comparative example 8a, either still glued from filter loss and cut performance, it lifts journey
Degree is all and unobvious；And from embodiment 8 and comparative example 8c comparative descriptions, either filter loss, which is still glued, cuts aspect of performance, real
Applying to have in example 8 significantly improves.
Embodiments of the present invention and application effect described in detail above, still, the present invention is not limited to above-mentioned implementation
Detail in mode, in the range of the technology design of the present invention, technical scheme can be carried out a variety of simple
Modification, these simple variants belong to protection scope of the present invention.It is further to note that in above-mentioned embodiment
Described each particular technique feature, in the case of reconcilable, it can be combined by any suitable means.In order to
Unnecessary repetition is avoided, the present invention no longer separately illustrates to various combinations of possible ways.In addition, the various differences of the present invention
Embodiment between can also be combined, as long as its without prejudice to the present invention thought, it should equally be considered as this hair
Bright disclosure of that.
Claims (9)
1. a kind of drilling fluid inorganic-organic polymer inorganic agent, it is characterised in that the inorganic agent is by sulfonic acid monomer, carboxylic
Acid monomers, non-ionic monomer and inorganic material polymerize formation in the presence of initiator；And bag Li-Mg contained in the inorganic material
Silicate inorganic gel；Also comprising silicon magnesium gel, aluminium magensium silicate inorganic gel, aluminium triphosphate, swollen in the inorganic material
One or more in profit soil, sepiolite and attapulgite, the lithium magnesium silicate inorganic gel in the inorganic material account for inorganic
More than the 80wt% of the gross mass of material；Inorganic material accounts for sulfonic acid monomer, carboxylic acid described in used raw material before polymerisation
The mass percent of the gross mass of monomer, non-ionic monomer and inorganic material is 10~25%.
2. inorganic agent according to claim 1, it is characterised in that the sulfonic acid monomer is selected from 2- acrylamide -2- methyl
Propane sulfonic acid, 2- acryloxy -2- methyl propane sulfonic acids, acryloyl-oxy fourth sulfonic acid, 2- acrylamide -2- Phenyl-ethanesulfonic acids and 2- third
Acrylamide dodecyl sodium sulfonate, the carboxylic acid monomer are selected from acrylic acid, methacrylic acid, itaconic acid and maleic acid, it is described it is non-from
Sub- monomer is selected from acrylamide, N,N-DMAA, isobutyl group acrylamide and acrylonitrile.
3. inorganic agent according to claim 1, it is characterised in that the initiator is the oxygen for including Oxidizing and Reducing Agents
Change-reduction initiating system, wherein oxidant are selected from potassium peroxydisulfate, ammonium persulfate and sodium peroxydisulfate, and reducing agent is selected from bisulfite
Sodium, sodium sulfite, sodium thiosulfate, sodium pyrosulfite, ferrous sulfate and frerrous chloride.
4. a kind of preparation method of the inorganic agent as described in any one in claims 1 to 3, comprises the following steps：
1) inorganic material is added in the aqueous solution containing alkali, is ground after stirring with colloid mill, in temperature no more than 35 DEG C
Under the conditions of sulfonic acid monomer and carboxylic acid monomer are added into the mixed liquor after grinding, continue after stirring 1 minute~3 hours again thereto
Non-ionic monomer is added, reaction mixture is obtained after being further continued for stirring 1 minute~5 hours；
2) reaction mixture obtained by step 1) is inserted in polymerization reaction vessel, selectively continues stirring 1~30 minute,
Solution ph is adjusted to 8~11 with alkali, adds initiator, and it is 35~50 DEG C to control the initial temperature of polymerisation, reaction 2~
24 hours, obtain gum-like product；Products therefrom is dry and crush and produce the inorganic agent.
5. preparation method according to claim 4, it is characterised in that in step 1) sulfonic acid monomer, carboxylic acid monomer and non-from
The ratio between amount of material between sub- monomer is 10~40:10~25:80~35.
6. preparation method according to claim 4, it is characterised in that the dosage of the reaction mixture reclaimed water of step 1) be with
The gross mass for controlling reaction raw materials is the 40~60% of the quality of reaction mixture.
7. preparation method according to claim 4, it is characterised in that the dosage of the initiator is sulfonic acid monomer, carboxylic acid
0.2~0.75wt% of monomer and non-ionic monomer gross mass, and the mass ratio of the oxidant and the reducing agent is 1:1~
2.5。
8. the preparation method according to any one in claim 4~7, it is characterised in that the thing of alkali used in step 1)
The amount of matter is 1 with the ratio of the carboxylic acid monomer and the amount sum of the material of sulfonic acid monomer:0.9~1.1.
9. preparation method according to claim 8, it is characterised in that the amount of the material of alkali used and the carboxylic in step 1)
The ratio of the amount sum of the material of acid monomers and sulfonic acid monomer is 1：1.
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